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  2. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-000158935.html

    "Sigma” is a slang word for “the best” or someone who is a humble alpha male. ... Another definition for “sigma” says Lindsay, is “the best.” ...

  3. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    Sigma (/ ˈ s ɪ ɡ m ə / SIG-mə; [1] uppercase Σ, lowercase σ, lowercase in word-final position ς; Ancient Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In the system of Greek numerals , it has a value of 200.

  4. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-210752971.html

    Sigma meaning (TODAY Illustration) Lindsay added, “So they have the ‘alpha’ which is the most successful, the best looking and then they have ‘sigma’ which is the same thing as an alpha ...

  5. Alpha and beta male - Wikipedia

    en.wikipedia.org/wiki/Alpha_and_beta_male

    Sigma male is an internet slang term to describe solitary, masculine men. The term gained prominence within Internet culture during the late 2010s and early 2020s, and has inspired numerous memes, graffitis and videos. [32] It is used to denote a male who is equivalent to an alpha male but exists outside the alpha-beta male hierarchy as a "lone ...

  6. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    Standard deviation may be abbreviated SD or std dev, and is most commonly represented in mathematical texts and equations by the lowercase Greek letter σ (sigma), for the population standard deviation, or the Latin letter s, for the sample standard deviation.

  7. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the stack alphabet in the formal definition of a pushdown automaton, or the tape-alphabet in the formal definition of a Turing machine; the Feferman–Schütte ordinal Γ 0; represents: the specific weight of substances; the lower incomplete gamma function; the third angle in a triangle, opposite the side c

  8. σ-algebra - Wikipedia

    en.wikipedia.org/wiki/Σ-algebra

    The main use of σ-algebras is in the definition of measures; specifically, the collection of those subsets for which a given measure is defined is necessarily a σ-algebra. This concept is important in mathematical analysis as the foundation for Lebesgue integration , and in probability theory , where it is interpreted as the collection of ...

  9. Sigma (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Sigma_(disambiguation)

    Sigma , the main antagonist of the Mega Man X series; Sigma , a hero from Overwatch; Ninja Gaiden Sigma, a video game; Sigma, a character in the BioShock 2 video game universe; Sigma Harmonics, a video game; Sigma Klim, a major character and protagonist in the Zero Escape video game series; Sigma, a team on the Dota 2 online video game